If you have the 500 they are bulletproof.Never heard of one failing.You checked all the bullet connectors which are above radiator?Hey the main power relay make sure it is connected securely to the socket.There was a bulletin on that also that instructs you to put a ziptie around it and the plug to keep them together.It is located in the tray below the airfilter in your case with 500 there are two of them.Little black squares about a inch long and wide.

 

Alright I checked the relays their tight. I don't know if they're still good, can I blow these? I changed my ecm back to my stock one, it does the same thing. My battery is fine. I'm going to hot wire my pump. Is there any damage I can do by trying to do this. I won't test it until one of you guys gets back to me. Oh yeah, is there any way that bad gas could gum up the guts in the pump?

 

I hotwired the pump away from my bike but nothing happened so I think the pump just crapped out. I hooked it up to my battery with some jumper cables. This should have made the pump run, right? It still doesn't explain why there is no power to the hot wire. Is it wise to start tearing into my harness?

 

If you hot wired it to your battery and it didnt run either the battery is bad or if it is good your pump is shot.When you test for power to fuel pump you would have to turn the key off then back on or bump the start button since there would only be power there for a few seconds unless the motor is running.That is why we have to prime these motors to start them when cold.

 

Well, that explains why I don't have power to it. Thanks, now all I have to do is go out and throw down more money on a new/used fuel pump. Has your bike had to have many parts replacements. My bike is only 2 years old, maybe a little over that and I have already replaced the battery 3 times, the solenoid once, the shift shaft, the radiator, 3 overflow coolant tanks, 2 caps for them, one injector stud, 4 wheel studs, one water pump seal, one oil seal, one impeller, a clutch, my front brake lever and lines (My own fault), and about 100 of those little o-rings that keep the fuel from leaking past the quick release plugs in the fuel tank. One thing I've never had to worry about was the motor's internals. Thanks again for the insight I'll write back after I get a pump and tell you how it goes.

 

Wow that is quite a list!I have ruined a couple wheel studs,chain sliders,rear axle bearings,brake pads,1gas tank cause of leaking(warranty),1motor oil blowby(warranty),1motor cracked engine mount(warranty),two engine cradles cracked,tierod ends2times,original battery.I had it three seasons now.Very happy!But only seriously MX'ed first year.I had 250r's that would make your list look small while MXing.That is really hard on any machine.

 

Before you buy a Cannondale fuel pump you might do some research. I remember reading on one of these forums where someone found the identical fuel pump off a vehicle, can't remember which one, something like a Ford pickup or something like that. It would certainly be alot cheaper!

Looks like Napa has the same fuel pump:
Napa #NPF-P74028